What was found
DURING ANNUAL INSP, RT WING AUXILIARY TRANSFER PUMP PRESS SWITCH THAT OPERATES RT AUX PUMP ANNUNCIATOR LIGHT, WAS FOUND TO HAVE LIGHT FUEL STAINING AROUND BASE OF MICROSWITCH. AFTER REMOVING PRESS SWITCH ASSY (DUE TO CONDITION OF LEFT ONE), FOUND PIPE THREAD PORTION OF AN 816-6-20 VISIBLE, EXPOSING SEVERE CORROSION TO THE POINT OF ALMOST HALF DIAMETER BEING ERODED AWAY. (X)